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    CANCELLATION OF SPURIOUS INTERMODULATION PRODUCTS PRODUCED IN NONLINEAR CHANNELS BY FREQUENCY HOPPED SIGNALS AND SPURIOUS SIGNALS
    2.
    发明公开
    CANCELLATION OF SPURIOUS INTERMODULATION PRODUCTS PRODUCED IN NONLINEAR CHANNELS BY FREQUENCY HOPPED SIGNALS AND SPURIOUS SIGNALS 审中-公开

    公开(公告)号：US20240313814A1

    公开(公告)日：2024-09-19

    申请号：US18513385

    申请日：2023-11-17

    Applicant: Finesse Wireless, LLC

    Inventor： Francis J. Smith

    IPC: H04B1/10

    CPC classification number: H04B1/1036

    Abstract: A method and apparatus for intermodulation product (IMP) cancellation. In one embodiment, the method comprises: acquiring copies of source signals that create IMPs in a passband of interest; creating copies of the IMPs for use as IMP cancellation signals by either multiplying the source signals together as a series of digital samples such that the multiplied signals create a near real and continuous time copy of the IMPs or creating a sum of the source signals in near real and continuous time and convolving the sum of the source signals with a mathematical model to effectively multiply the signals together to create a copy of the IMPs; adjusting one or both of phase and amplitude of the copies; and using the copies to cancel the IMPs inband of the passband of interest.

    WIDEBAND RECEIVER WITH INTERFERER REJECTION
    3.
    发明公开
    WIDEBAND RECEIVER WITH INTERFERER REJECTION 审中-公开

    公开(公告)号：US20240313813A1

    公开(公告)日：2024-09-19

    申请号：US18272602

    申请日：2022-01-11

    Applicant: RAFAEL ADVANCED DEFENSE SYSTEMS LTD.

    Inventor： David PEZO ,  Eli YONA ,  Tali KAGAN ,  Avigdor BRILLANT ,  Rafael AZOULAY

    IPC: H04B1/10 ,  H04B1/12

    CPC classification number: H04B1/1036 ,  H04B1/109 ,  H04B1/126

    Abstract: A receiver system has at least one antenna that receives a plurality of signals, including a desired signal, across a wide band of frequencies. At least one tunable filter is in signal communication with the at least one antenna, and filters the plurality of signals to produce a plurality of filtered signals. Gain control circuitry is in signal communication with the at least one tunable filter, and produces a gain adjusted version of the filtered signals. A processing unit processes received signals in a portion of the wide band to extract signal characteristics of at least one undesired signal in the portion of the wide band. The at least one tunable filter is tuned based at least in part on the signal characteristics of the at least one undesired signal to maintain the SNR of the desired signal above a threshold level at the output of the gain control circuitry.

    SYSTEMS AND METHODS FOR SIGNAL PATH ISOLATION FOR NEUTRAL-HOST HARDWARE
    4.
    发明公开
    SYSTEMS AND METHODS FOR SIGNAL PATH ISOLATION FOR NEUTRAL-HOST HARDWARE 审中-公开

    公开(公告)号：US20240305329A1

    公开(公告)日：2024-09-12

    申请号：US18667787

    申请日：2024-05-17

    Applicant: CommScope Technologies LLC

    Inventor： Johannes Steigert

    IPC: H04B1/525 ,  H04B1/10 ,  H04B1/58

    CPC classification number: H04B1/525 ,  H04B1/1036 ,  H04B1/58 ,  H04B2001/1045 ,  H04B2001/1072

    Abstract: Systems and methods for signal path isolation for neutral-host hardware are provided. In one embodiment, an isolation circuit for a multiple-subchannel wireless communication transceiver comprises: a Tx path coupled to a transmit path output of a multiple-subchannel transceiver; a Rx path coupled to a receive path input of the transceiver; a precancellation circuit comprising: an isolation adjustment circuit within the transmit path of the isolation circuit, the isolation adjustment circuit comprising a phase shifter and a reflection tuner; a directional coupler within the Rx path of the isolation circuit. The isolation adjustment circuit outputs a reflected wave signal comprising a cancellation reference signal to the directional coupler. The cancellation reference signal comprises a complex conjugate of a TX signal leakage signal component of a signal transported in the Rx path of the isolation circuit. Within the directional coupler the cancellation reference signal destructively interferes with TX signal leakage signal component.

    AGGREGATE INTERFERENCE CANCELATION USING NEURAL NETWORKS
    6.
    发明公开
    AGGREGATE INTERFERENCE CANCELATION USING NEURAL NETWORKS 审中-公开

    公开(公告)号：US20240291511A1

    公开(公告)日：2024-08-29

    申请号：US18584739

    申请日：2024-02-22

    Applicant: Micron Technology, Inc.

    Inventor： Fa-Long Luo ,  Jaime Cummins

    IPC: H04B1/10 ,  H04B17/345 ,  H04B17/391

    CPC classification number: H04B1/1036 ,  H04B17/345 ,  H04B17/3913

    Abstract: A wireless device includes a wireless receiver configured to receive a respective plurality of receive signals from a respective receiving antenna of a plurality of receiving antennas and an interference mitigation circuit coupled to the respective receiving antenna and including a neural network. The interference mitigation circuit is configured to receive an interference mitigation mode signal indicating two or more interference types of a plurality of interference types to mitigate. In response to the interference mitigation mode signal, the interference mitigation circuit is configured to adjust weights applied by the neural network for adjusted signals to cause the neural network to mitigate the two or more interference types of the plurality of interference types while receiving the plurality of receive signals.

    METHODS AND APPARATUSES FOR AN AUTONOMOUSLY TUNABLE INTERFERENCE TRACKING FILTER
    7.
    发明公开
    METHODS AND APPARATUSES FOR AN AUTONOMOUSLY TUNABLE INTERFERENCE TRACKING FILTER 审中-公开

    公开(公告)号：US20240275415A1

    公开(公告)日：2024-08-15

    申请号：US18441922

    申请日：2024-02-14

    Applicant: The Government of the United States, as represented by the Secretary of the Navy

    Inventor： Sanghoon Shin ,  Hans Haucke

    IPC: H04B1/10 ,  H04B1/16

    CPC classification number: H04B1/1036 ,  H04B1/1607

    Abstract: Methods and apparatuses for attenuating an interferer signal are provided. The apparatus includes a tunable filter and an autonomous tracking control circuit. The tunable filter is constructed to receive signals within a frequency bandwidth and includes a plurality of tunable bandpass filters with respective bandpass filter responses. The tunable filter has a band reject filter response that is dependent upon the bandpass filter responses. The autonomous tracking control circuit is constructed to track an interferer signal within the frequency bandwidth and perform voltage control on the plurality of tunable bandpass filters to alter the band reject filter response of the tunable filter such that the interferer signal is attenuated in an output of the tunable filter.

    Hybridized Wideband Notch-Filter Topologies and Methods
    8.
    发明公开
    Hybridized Wideband Notch-Filter Topologies and Methods 审中-公开

    公开(公告)号：US20240137058A1

    公开(公告)日：2024-04-25

    申请号：US18503965

    申请日：2023-11-07

    Applicant: pSemi Corporation

    Inventor： William Richard Smith, Jr. ,  Muhammed Ibrahim Sezan ,  Dan William Nobbe

    IPC: H04B1/10 ,  H04B1/04

    CPC classification number: H04B1/1036 ,  H04B1/0483 ,  H04B2001/1063 ,  H04B2001/1072

    Abstract: Radio frequency (RF) acoustic wave resonator (AWR) filter circuits and methods. Embodiments essentially de-couple the stopband or notch characteristics of an RF filter from the passband characteristics. Accordingly, the de-coupled parameters can be individually designed to meet the specifications of a particular application. Partially-hybridized or fully-hybridized series-arm and parallel-arm AWR filter building blocks enable “de-coupled” RF filters having (1) wideband and low insertion loss passbands and (2) wideband deep notches (stopbands) with a specifically placed notch center frequency, without compromising the passband characteristics. The AWR filter building blocks include an inductance L that matches (resonates with) the electrostatic capacitance CO of the corresponding AWR within a desired passband. The resonance and anti-resonance frequencies of the building block AWRs are selected to be spaced apart from the specified passband in order to provide independent stopband or notch characteristics without substantially affecting the passband characteristics.

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